diff --git a/modules/openapi-generator/src/main/resources/typescript-axios/apiInner.mustache b/modules/openapi-generator/src/main/resources/typescript-axios/apiInner.mustache
index 11e6ef8fbe2..73bdc76f818 100644
--- a/modules/openapi-generator/src/main/resources/typescript-axios/apiInner.mustache
+++ b/modules/openapi-generator/src/main/resources/typescript-axios/apiInner.mustache
@@ -167,13 +167,13 @@ export const {{classname}}AxiosParamCreator = function (configuration?: Configur
             {{^isCollectionFormatMulti}}
                 localVarFormParams.{{#multipartFormData}}append{{/multipartFormData}}{{^multipartFormData}}set{{/multipartFormData}}({{paramName}}.join(COLLECTION_FORMATS.{{collectionFormat}});
             {{/isCollectionFormatMulti}}
-            }
-            {{/isArray}}
+            }{{/isArray}}
             {{^isArray}}
-            if ({{paramName}} !== undefined) {
-                localVarFormParams.{{#multipartFormData}}append{{/multipartFormData}}{{^multipartFormData}}set{{/multipartFormData}}('{{baseName}}', {{paramName}} as any);
-            }
-            {{/isArray}}
+            if ({{paramName}} !== undefined) { {{^multipartFormData}}
+                localVarFormParams.set('{{baseName}}', {{paramName}} as any);{{/multipartFormData}}{{#multipartFormData}}{{#isPrimitiveType}}
+                localVarFormParams.append('{{baseName}}', {{paramName}} as any);{{/isPrimitiveType}}{{^isPrimitiveType}}
+                localVarFormParams.append('{{baseName}}', new Blob([JSON.stringify({{paramName}})], { type: "application/json", }));{{/isPrimitiveType}}{{/multipartFormData}}
+            }{{/isArray}}
     {{/formParams}}{{/vendorExtensions}}
     {{#vendorExtensions}}{{#hasFormParams}}{{^multipartFormData}}
             localVarHeaderParameter['Content-Type'] = 'application/x-www-form-urlencoded';{{/multipartFormData}}{{#multipartFormData}}
diff --git a/samples/client/petstore/typescript-axios/builds/default/api.ts b/samples/client/petstore/typescript-axios/builds/default/api.ts
index 04dd0d5c607..3daa0051c34 100644
--- a/samples/client/petstore/typescript-axios/builds/default/api.ts
+++ b/samples/client/petstore/typescript-axios/builds/default/api.ts
@@ -617,10 +617,12 @@ export const PetApiAxiosParamCreator = function (configuration?: Configuration)
                 localVarHeaderParameter["Authorization"] = "Bearer " + localVarAccessTokenValue;
             }
 
-            if (name !== undefined) {
+
+            if (name !== undefined) { 
                 localVarFormParams.set('name', name as any);
             }
-                if (status !== undefined) {
+    
+            if (status !== undefined) { 
                 localVarFormParams.set('status', status as any);
             }
     
@@ -681,10 +683,12 @@ export const PetApiAxiosParamCreator = function (configuration?: Configuration)
                 localVarHeaderParameter["Authorization"] = "Bearer " + localVarAccessTokenValue;
             }
 
-            if (additionalMetadata !== undefined) {
+
+            if (additionalMetadata !== undefined) { 
                 localVarFormParams.append('additionalMetadata', additionalMetadata as any);
             }
-                if (file !== undefined) {
+    
+            if (file !== undefined) { 
                 localVarFormParams.append('file', file as any);
             }
     
diff --git a/samples/client/petstore/typescript-axios/builds/es6-target/api.ts b/samples/client/petstore/typescript-axios/builds/es6-target/api.ts
index 04dd0d5c607..3daa0051c34 100644
--- a/samples/client/petstore/typescript-axios/builds/es6-target/api.ts
+++ b/samples/client/petstore/typescript-axios/builds/es6-target/api.ts
@@ -617,10 +617,12 @@ export const PetApiAxiosParamCreator = function (configuration?: Configuration)
                 localVarHeaderParameter["Authorization"] = "Bearer " + localVarAccessTokenValue;
             }
 
-            if (name !== undefined) {
+
+            if (name !== undefined) { 
                 localVarFormParams.set('name', name as any);
             }
-                if (status !== undefined) {
+    
+            if (status !== undefined) { 
                 localVarFormParams.set('status', status as any);
             }
     
@@ -681,10 +683,12 @@ export const PetApiAxiosParamCreator = function (configuration?: Configuration)
                 localVarHeaderParameter["Authorization"] = "Bearer " + localVarAccessTokenValue;
             }
 
-            if (additionalMetadata !== undefined) {
+
+            if (additionalMetadata !== undefined) { 
                 localVarFormParams.append('additionalMetadata', additionalMetadata as any);
             }
-                if (file !== undefined) {
+    
+            if (file !== undefined) { 
                 localVarFormParams.append('file', file as any);
             }
     
diff --git a/samples/client/petstore/typescript-axios/builds/with-complex-headers/api.ts b/samples/client/petstore/typescript-axios/builds/with-complex-headers/api.ts
index e400f023aac..81df4ead4df 100644
--- a/samples/client/petstore/typescript-axios/builds/with-complex-headers/api.ts
+++ b/samples/client/petstore/typescript-axios/builds/with-complex-headers/api.ts
@@ -666,10 +666,12 @@ export const PetApiAxiosParamCreator = function (configuration?: Configuration)
                 localVarHeaderParameter["Authorization"] = "Bearer " + localVarAccessTokenValue;
             }
 
-            if (name !== undefined) {
+
+            if (name !== undefined) { 
                 localVarFormParams.set('name', name as any);
             }
-                if (status !== undefined) {
+    
+            if (status !== undefined) { 
                 localVarFormParams.set('status', status as any);
             }
     
@@ -730,10 +732,12 @@ export const PetApiAxiosParamCreator = function (configuration?: Configuration)
                 localVarHeaderParameter["Authorization"] = "Bearer " + localVarAccessTokenValue;
             }
 
-            if (additionalMetadata !== undefined) {
+
+            if (additionalMetadata !== undefined) { 
                 localVarFormParams.append('additionalMetadata', additionalMetadata as any);
             }
-                if (file !== undefined) {
+    
+            if (file !== undefined) { 
                 localVarFormParams.append('file', file as any);
             }
     
diff --git a/samples/client/petstore/typescript-axios/builds/with-interfaces/api.ts b/samples/client/petstore/typescript-axios/builds/with-interfaces/api.ts
index fd4a2dd18eb..63a7b98bf53 100644
--- a/samples/client/petstore/typescript-axios/builds/with-interfaces/api.ts
+++ b/samples/client/petstore/typescript-axios/builds/with-interfaces/api.ts
@@ -617,10 +617,12 @@ export const PetApiAxiosParamCreator = function (configuration?: Configuration)
                 localVarHeaderParameter["Authorization"] = "Bearer " + localVarAccessTokenValue;
             }
 
-            if (name !== undefined) {
+
+            if (name !== undefined) { 
                 localVarFormParams.set('name', name as any);
             }
-                if (status !== undefined) {
+    
+            if (status !== undefined) { 
                 localVarFormParams.set('status', status as any);
             }
     
@@ -681,10 +683,12 @@ export const PetApiAxiosParamCreator = function (configuration?: Configuration)
                 localVarHeaderParameter["Authorization"] = "Bearer " + localVarAccessTokenValue;
             }
 
-            if (additionalMetadata !== undefined) {
+
+            if (additionalMetadata !== undefined) { 
                 localVarFormParams.append('additionalMetadata', additionalMetadata as any);
             }
-                if (file !== undefined) {
+    
+            if (file !== undefined) { 
                 localVarFormParams.append('file', file as any);
             }
     
diff --git a/samples/client/petstore/typescript-axios/builds/with-npm-version-and-separate-models-and-api/api/another/level/pet-api.ts b/samples/client/petstore/typescript-axios/builds/with-npm-version-and-separate-models-and-api/api/another/level/pet-api.ts
index 0da3586bcf8..989370233a7 100644
--- a/samples/client/petstore/typescript-axios/builds/with-npm-version-and-separate-models-and-api/api/another/level/pet-api.ts
+++ b/samples/client/petstore/typescript-axios/builds/with-npm-version-and-separate-models-and-api/api/another/level/pet-api.ts
@@ -393,10 +393,12 @@ export const PetApiAxiosParamCreator = function (configuration?: Configuration)
                 localVarHeaderParameter["Authorization"] = "Bearer " + localVarAccessTokenValue;
             }
 
-            if (name !== undefined) {
+
+            if (name !== undefined) { 
                 localVarFormParams.set('name', name as any);
             }
-                if (status !== undefined) {
+    
+            if (status !== undefined) { 
                 localVarFormParams.set('status', status as any);
             }
     
@@ -457,10 +459,12 @@ export const PetApiAxiosParamCreator = function (configuration?: Configuration)
                 localVarHeaderParameter["Authorization"] = "Bearer " + localVarAccessTokenValue;
             }
 
-            if (additionalMetadata !== undefined) {
+
+            if (additionalMetadata !== undefined) { 
                 localVarFormParams.append('additionalMetadata', additionalMetadata as any);
             }
-                if (file !== undefined) {
+    
+            if (file !== undefined) { 
                 localVarFormParams.append('file', file as any);
             }
     
diff --git a/samples/client/petstore/typescript-axios/builds/with-npm-version/api.ts b/samples/client/petstore/typescript-axios/builds/with-npm-version/api.ts
index 04dd0d5c607..3daa0051c34 100644
--- a/samples/client/petstore/typescript-axios/builds/with-npm-version/api.ts
+++ b/samples/client/petstore/typescript-axios/builds/with-npm-version/api.ts
@@ -617,10 +617,12 @@ export const PetApiAxiosParamCreator = function (configuration?: Configuration)
                 localVarHeaderParameter["Authorization"] = "Bearer " + localVarAccessTokenValue;
             }
 
-            if (name !== undefined) {
+
+            if (name !== undefined) { 
                 localVarFormParams.set('name', name as any);
             }
-                if (status !== undefined) {
+    
+            if (status !== undefined) { 
                 localVarFormParams.set('status', status as any);
             }
     
@@ -681,10 +683,12 @@ export const PetApiAxiosParamCreator = function (configuration?: Configuration)
                 localVarHeaderParameter["Authorization"] = "Bearer " + localVarAccessTokenValue;
             }
 
-            if (additionalMetadata !== undefined) {
+
+            if (additionalMetadata !== undefined) { 
                 localVarFormParams.append('additionalMetadata', additionalMetadata as any);
             }
-                if (file !== undefined) {
+    
+            if (file !== undefined) { 
                 localVarFormParams.append('file', file as any);
             }
     
diff --git a/samples/client/petstore/typescript-axios/builds/with-single-request-parameters/api.ts b/samples/client/petstore/typescript-axios/builds/with-single-request-parameters/api.ts
index e9cf7deec7d..e498399e798 100644
--- a/samples/client/petstore/typescript-axios/builds/with-single-request-parameters/api.ts
+++ b/samples/client/petstore/typescript-axios/builds/with-single-request-parameters/api.ts
@@ -617,10 +617,12 @@ export const PetApiAxiosParamCreator = function (configuration?: Configuration)
                 localVarHeaderParameter["Authorization"] = "Bearer " + localVarAccessTokenValue;
             }
 
-            if (name !== undefined) {
+
+            if (name !== undefined) { 
                 localVarFormParams.set('name', name as any);
             }
-                if (status !== undefined) {
+    
+            if (status !== undefined) { 
                 localVarFormParams.set('status', status as any);
             }
     
@@ -681,10 +683,12 @@ export const PetApiAxiosParamCreator = function (configuration?: Configuration)
                 localVarHeaderParameter["Authorization"] = "Bearer " + localVarAccessTokenValue;
             }
 
-            if (additionalMetadata !== undefined) {
+
+            if (additionalMetadata !== undefined) { 
                 localVarFormParams.append('additionalMetadata', additionalMetadata as any);
             }
-                if (file !== undefined) {
+    
+            if (file !== undefined) { 
                 localVarFormParams.append('file', file as any);
             }